Hard lumps in the breasts of developing girls are a relatively common occurrence. The instability of estrogen in the female body during puberty sometimes causes the development of hyperplasia in the female breast. The hard lumps may form in the breast, sometimes with spontaneous swelling and pain, mostly related to menstruation. If the pain is worse before menstruation and less after, consider cystic hyperplasia of the breast also called lobular hyperplasia of the breast. If the symptoms are not severe, you can leave them alone for the time being. If the symptoms are severe, you will need medication, such as prozac, xiaojin pill, and breast fetish elimination. Other conditions such as fibroadenoma of the breast. This is a benign tumor of the breast, the clinical manifestation is a hard lump in the breast, the surface is relatively smooth, the mobility is better, you can do the ultrasound basic clear, the problem is not big.